1202.1640 (P. Bicudo et al.)

Computation of pion and kaon heavy ion multiplicities in a gluon-meson
model    [PDF]

P. Bicudo, F. Giacosa, E. Seel

In high energy Heavy Ion Collisions, the onset of the quark-gluon plasma is
the colour glass condensate, dominated by gluons. The final state is hadronic,
and dominated by pions and kaons. Here we investigate an effective approach of
QCD with these bosonic fields and which can help to describe the transition of
gluons into light mesons. Formally, our approach consists in integrating out
the quark fields from the QCD path integral, utilizing auxiliary fields. In
this way the fermionic fields are replaced by light mesons, such as the pions
and sigma field. We apply our effective action to compute the number of pions
and kaons per gluon emitted by a Boltzmann gluon gas, their multiplicities as
function of a gluon mass. We conclude that an effective gluon mass remains
finite at T=Tc.

View original: http://arxiv.org/abs/1202.1640